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- Title
Phase transitions associated with magnetic-field induced topological orbital momenta in a non-collinear antiferromagnet.
- Authors
Deng, Sihao; Gomonay, Olena; Chen, Jie; Fischer, Gerda; He, Lunhua; Wang, Cong; Huang, Qingzhen; Shen, Feiran; Tan, Zhijian; Zhou, Rui; Hu, Ze; Šmejkal, Libor; Sinova, Jairo; Wernsdorfer, Wolfgang; Sürgers, Christoph
- Abstract
Resistivity measurements are widely exploited to uncover electronic excitations and phase transitions in metallic solids. While single crystals are preferably studied to explore crystalline anisotropies, these usually cancel out in polycrystalline materials. Here we show that in polycrystalline Mn3Zn0.5Ge0.5N with non-collinear antiferromagnetic order, changes in the diagonal and, rather unexpected, off-diagonal components of the resistivity tensor occur at low temperatures indicating subtle transitions between magnetic phases of different symmetry. This is supported by neutron scattering and explained within a phenomenological model which suggests that the phase transitions in magnetic field are associated with field induced topological orbital momenta. The fact that we observe transitions between spin phases in a polycrystal, where effects of crystalline anisotropy are cancelled suggests that they are only controlled by exchange interactions. The observation of an off-diagonal resistivity extends the possibilities for realising antiferromagnetic spintronics with polycrystalline materials. Recent work has demonstrated the potential of polycrystalIine antiferromagnetic materials for spintronics. Here the authors report evidence of magnetic phase transitions in a polycrystalline non-collinear antiferromagnet, which are explained by a phenomenological model with topological orbital momenta.
- Subjects
MAGNETIC transitions; ANTIFERROMAGNETIC materials; PHASE transitions; ELECTRONIC excitation; NEUTRON scattering; MAGNETIC fields
- Publication
Nature Communications, 2024, Vol 15, Issue 1, p1
- ISSN
2041-1723
- Publication type
Article
- DOI
10.1038/s41467-024-45129-x